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TwinCamGTS

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## Homework Statement

In the figure below, you will attach one or more light bulbs of R=30.12 Ω in parallel with the battery (with ε = 20 V, internal resistance r). (i will upload with work and the picture of the wiring diagram)

a.) For an ideal battery (r=0), what would be power dissipated in the first bulb if it was:

connected alone:

P=____ watt

connected as one of four bulbs:

P=____ watt

b.) For a non-ideal battery where r=1.1 Ω,

i) reanswer part a). Also, in each case find the voltage drop that would be measured across the battery terminals:

connected alone:

P=____ watt Vbattery=____ Volt

connected as one of four bulbs:

P=____ watt Vbattery=____ volt

ii) Challenge:

Suppose you wish to dim the first bulb, such that its power output is at or below ___% of its value when connected alone. Find the minimum number of total bulbs you must connect in parallel to make this happen.

Solve for a general expression so you can use it for all the cases below.

50% of its actual value

35% of its actual value

10% of its actual value

## Homework Equations

V=I*R

P=(v^2)/r p=I*v p=(i^2)*r

## The Attempt at a Solution

i did mostly all of them except the challenge problem. i don't know how to start. I will be grateful if someone can tell me how to do it. Thank you for your time and your help.

#### Attachments

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